Pure 2Improve training tube doorway. Turn a door frame with a training tube into a training ground. Use the P2I tube by attaching it to a high door frame to perform jaw lifts and stretching exercises, or low to train the abdominal muscles. Material: steel and foam. Mini-max door opening 63-96cm. Maximum weight 120kg. Black steel, black red striped foam handles. No tools are required to install the pipe, the lever is pushed firmly between the door frames by turning.